A man is 6.0 ft tall, what is the smallest size plane mirror he can use to see his entire image ?

Asked by arindeep.singh | 27th May, 2020, 12:18: PM

Expert Answer:

The minimum height of plane mirror to enable a person to see full image is ½ of his height.

According to the principle of reflection, the angle of incidence is equal to angle of refraction. When the ray of light travels from bottom to top of a person and reaches his eyes, then he is able to see the clear image. Here, the ray from the foot strikes the mirror at its bottom and reaches his eye after reflecting from the mirror. Hence, the height of the mirror should be 3 feet.

Answered by Shiwani Sawant | 27th May, 2020, 01:41: PM